Pipe-gripping attachment for wrenches



(No Model.)

Patented Apr. 16, 1889.

N. PETERS, FhnlvLRhomphal'. Wznhinglnn, DTC

I UNITED STATES ATENT OFFICE.

CHARLES H. THOMAS, OF HANCOCK, ISCONSIN.

PIPE-GRIPPING ATTACHMENT FOR WRENCHES.

SPECIFICATION forming part of Letters Patent No. 401,605, dated April16, 1889.

Application filed December 14, 1388.

To all whom it may concern.-

Be it known that I, CHARLES H. THOMAS, of Hancock, in the county ofWaushara and State of \Visconsin, have invented a new and usefulPipe-Gripping Attachment to a Monkey-Wrench; and I do hereby declare thefollowing to be a full, clear, and exact descrip tion of said invention,reference being had to the accompanying drawings, and to thelettersorfigures of reference marked thereon, which form a part of thisspecification.

My invention is of a simple device intended and adapted to be attachedto an ordinary monkeywrench, whereby such wrench is made capable ofsuccessfully gripping and turning ordinary pipe, like gas-pipe.

In the drawings, Figure 1 is a perspective view of my complete device.Fig. 2 is aview of a monkey-wrench with my device affixed thereto. Fig.3 is a transverse vertical section of the monkey-wrench on line X X ofFig. 2, showing an elevation of my device as connected therewith.

The same letters refer to like parts in all the views.

The monkey-wrench shown in the draw ings, which is of a form best suitedfor the use of my device in connection therewith, consists of the handleA, shank B, head 0, having the forwardly-projecting jaw D, the travelingjaw E, the screw F, turning at one end in a part of the jaw E andbearing at its other end against the collar II, and provided with anintegral milled-edge collar G, by means of which screw F the jawE ismade to travel back and forth on the shank B toward and from the jaw D.

My improved device, which is adapted to be secured to the inner face ofthe jaw D, consists of a plate, I, having a tang, K, intended to passdownwardly alongside of the shank B and to bear against it, terminatingin a screw-threaded end, on which is a thumbscrew, L. Another tang, M,is intended and adapted to extend downwardly alongside the shank B onthe opposite side from the shank K, and to act as a guard with the tangK to hold the device in position 011 the shank B. I also preferably turnthe top of the plate I Serial No. 293,606. (No model.)

over rearwardly, forming a kind of hook, 0, adapted to engage on the endof the jaw D to still further aid in holding the plate in position. Ialso preferably construct the tang K with a shoulder at S, so that thenut L is permitted to come up alongside the head 0, the wings M M beingcapable of being rotated under the head, as shown in the drawings 2 and3. The face of the plate I is provided with two, three, or more sharpdownwardlyprojecting teeth, P P P", intended and adapted to engage thesurface of a pipe, R, a little above its greatest lateral diameter whenthe pipe rests 011 the shank B, as shown in Fig. 2, whereby, when thepipe is firmly clutched in the wrench, by moving the jaw E against it,holding it firmly in contact with the teeth of the plate I, the pipe maybe turned by a movement of the handle A upwardly. The teeth P P P" arepreferably so constructed that each outer or upper tooth, as shown inFig. 2, is a little longer than the next lower onethat is, that itprojects forwardly toward the pipe a little farther than the oneimmediately below itand also the second tooth is a little farther fromthe first tooth, P, than the first tooth, P, is from the shank B, andthe third tooth, P", is a little farther from the second tooth, P, thanthe second tooth is from the first tooth, P, whereby these teeth areespecially adapted for gripping pipes of different sizes, so that withan ordinary monkey-wrench this device is adapted to enable the wrench togrip a pipe from one-half inch up to two inches and a half in diameter.

What I claim as new, and desire to secure by Letters Patent, is

1. The combination of a wrench having a shank, B, a fixed jaw, D, andtraveling jaw E, with a removable plate, I, said plate being providedwith a hook, O, downwardly-turned teeth P P P, a long screw-threadledtang, K, and a short tang, N, and a thumb-nut, L, turning on thescrew-threaded tang K against shank B, all substantially as and for thepurpose described.

2. The combination of a wrench having a shank, B, a fixed jaw, D, ahead, 0, and a traveling jaw, E, With a removable plate, I, hav- Intestimony whereof I affix my signature in ing a hook, O, a series ofdownwardly-propresence of two Witnesses.

jeeting teeth, P P P, a long screw-threaded tang, K, a short tang, N,and a shoulder, S, CHARLES H. THOMAS. and a thumb-nut, L, the innertooth, P, being the shortest one and each outer tooth being Witnesses:

longer than the next inner tooth, all substan- 'W. H. CAMPFIELD,

tially as described. W. L. THOMAS.

